Bellows Pump
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United States of America Patent
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Issued Date -
Mar 13, 2014
app pub date -
Sep 9, 2013
filing date -
Sep 10, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A bellows pump including in its pump case (5) a pair of plastic bellows (6) that expand and contract to alternatingly execute an output stroke that sends fluid out of pump chambers (7) defined by the bellows and a suction stroke that supplies fluid to the pump chambers. Metal actuation plates (10) are provided in the pump case so as to be movable in the axial direction, and these actuation plates are fixedly connected to the bottom walls (6a) of the bellows in peripheral portions thereof so that the opposed end faces (10c, 6g) of the actuation plates and fluid-contact portions (6f), which are at the center of the bottom walls of the bellows and come into contact with fluid in the pump chambers, are set in a close contact to each other. The close-contact portions are sealed by O-rings (15).
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